lib/opencdk/filters.h

   1 /* filters.h - Filter structs
   2  * Copyright (C) 2002, 2003, 2008, 2010 Free Software Foundation, Inc.
   3  *
   4  * Author: Timo Schulz
   5  *
   6  * This file is part of OpenCDK.
   7  *
   8  * The OpenCDK library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 2.1 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  21  * USA
  22  *
  23  */
  24 #ifndef CDK_FILTERS_H
  25 #define CDK_FILTERS_H
  26
  27 enum
  28 {
  29   STREAMCTL_READ = 0,
  30   STREAMCTL_WRITE = 1,
  31   STREAMCTL_FREE = 2
  32 };
  33
  34 typedef struct
  35 {
  36   cipher_hd_st hd;
  37   digest_hd_st mdc;
  38   int mdc_method;
  39   u32 datalen;
  40   struct
  41   {
  42     size_t on;
  43     off_t size;
  44     off_t nleft;
  45   } blkmode;
  46   cdk_stream_t s;
  47 } cipher_filter_t;
  48
  49 typedef struct
  50 {
  51   int digest_algo;
  52   digest_hd_st md;
  53   int md_initialized;
  54 } md_filter_t;
  55
  56 typedef struct
  57 {
  58   const char *le;               /* line endings */
  59   const char *hdrlines;
  60   u32 crc;
  61   int crc_okay;
  62   int idx, idx2;
  63 } armor_filter_t;
  64
  65 typedef struct
  66 {
  67   cdk_lit_format_t mode;
  68   char *orig_filename;          /* This original name of the input file. */
  69   char *filename;
  70   digest_hd_st md;
  71   int md_initialized;
  72   struct
  73   {
  74     size_t on;
  75     off_t size;
  76   } blkmode;
  77 } literal_filter_t;
  78
  79 typedef struct
  80 {
  81   size_t inbufsize;
  82   byte inbuf[8192];
  83   size_t outbufsize;
  84   byte outbuf[8192];
  85   int algo;                     /* compress algo */
  86   int level;
  87 } compress_filter_t;
  88
  89 typedef struct
  90 {
  91   const char *lf;
  92 } text_filter_t;
  93
  94
  95 /*-- armor.c -*/
  96 int _cdk_filter_armor (void *opaque, int ctl, FILE * in, FILE * out);
  97
  98 /*-- cipher.c --*/
  99 cdk_error_t _cdk_filter_hash (void *opaque, int ctl, FILE * in, FILE * out);
 100 cdk_error_t _cdk_filter_cipher (void *opaque, int ctl, FILE * in, FILE * out);
 101
 102 /*-- literal.c --*/
 103 int _cdk_filter_literal (void *opaque, int ctl, FILE * in, FILE * out);
 104 int _cdk_filter_text (void *opaque, int ctl, FILE * in, FILE * out);
 105
 106 /*-- compress.c --*/
 107 cdk_error_t _cdk_filter_compress (void *opaque, int ctl,
 108                                   FILE * in, FILE * out);
 109
 110 #endif /* CDK_FILTERS_H */